diff --git a/Common_FAST.NUM.mlpe b/Common_FAST.NUM.mlpe
index 2da9885..e3b6053 100644
--- a/Common_FAST.NUM.mlpe
+++ b/Common_FAST.NUM.mlpe
@@ -1532,7 +1532,10 @@ function MyAdjustLinearAxes()
 
    if EMT.REFLOC then
       local vtE
-      if EMT.HEAD ~= 'H3' then
+      -- su NUM aggregati non gestiti
+      if EMT.HEAD == 'H5' or EMT.HEAD == 'H6' or EMT.HEAD == 'H7' then
+         EmtSetLastError( 1211, "Aggregates not managed")
+      elseif EMT.HEAD ~= 'H3' then
          local Len = EMT.TLEN + EgtIf( EMT.HEAD == 'H1', MillOffs, abs( SawOffs))
          local LenRef = MillOffs
          vtE = Vector3d( EMT.EXTR) * Len - Z_AX() * LenRef